[vetteboy79]

And den? What did I say it has to do with geometry, I was talking about strength.

Again, it has nothing to do with strength.

By geometry he meant the cross-section of the tubing. Mod. of E. only relates stress and strain in a given sample under a given loading. You were more than likely thinking of moment of inertia, however after you defended the wrong thing twice, I'm not sure anymore.